Okay here's the formula:
Take the weight of the ice and divide it by the temp in F and divide that by the weight of the keys. Then multiply that number by 13.4217 and you have the number of minutes. The exact number of seconds is dependent on global warming in that particular area.
This secret and highly classified formula was extrapolated from a friend under a bridge who did happen to sneak into a Motel 6 one night so it should work.
Good luck and save me a ride.
